Dart lampholder



FIG. 1 is a left rear perspective view of a dart lampholder for use on a track showing my design with an adapter and track shown in phantom;

FIG. 2 is a right elevational view of the dart lampholder for use on a track as shown in FIG. 1, and the left elevational view is identical;

FIG. 3 is a front elevational view of the dart lampholder for use on a track as shown in FIG. 1;

FIG. 4 is a rear elevational view of the dart lampholder for use on a track as shown in FIG. 1;

FIG. 5 is a top view of the dart lampholder for use on a track as shown in FIG. 1; and,

FIG. 6 is a bottom view of the dart lampholder for use on a track as shown in FIG. 1.

The broken lines are shown for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a dart lampholder, as shown and described. 